原厂授权代理商， 深圳市诚信联科技有限公司，联系人：古小姐，０７５５－８６０９１９６３ １３２４９８２７１７０ Ｑ：１１３９１９６８０６ 2011/08/23 Low Power Lighting LED Driver Data sheet NU503 20mA Constant Current Regulator Features * Applications The most easy used linear constant current LED driver 20mA constant current regulator 1.4V ~ 17V wide working voltage range 5uS current rising time ~ 85 operating temperature -40 Cascade-able for higher voltage applications* Less than 2%/V line regulation Green package ℃ ℃ LED strip General LED lighting LCD back lighting LED torch / flashlight Package Type SOT 23-3 (2.9mm * 1.3mm) Patent pending VN NU20 NC VP Block Diagram per channel and Ideal IV characteristic VP IPN IV curve Vrefence VN Maximum Ratings (T = 25°°C) Characteristic Supply voltage Power Dissipation (Ta=25°C) Thermal Resistance (On PCB, Ta=25°C) Symbol Rating Unit VPN 0 ~ 17 V PD SOT 23 0.25 W RTH(j-a) SOT 23 300 °C /W Operating temperature TOPR -40~+85 °C Storage temperature TSTG -55~+150 °C ** IS - output saturation current. -1- Ver. 01 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805 NumEn Tech. NU503 Electrical Characteristics and Recommended Operating Conditions Characteristic Symbol Minimum dropout voltage VPNmin Output breakdown voltage VPNBD Output current Line regulation Min. Typ. Max. Unit - 1.4 1.6 V IPN = 0, VDD = 0V - - 17 V IS Spec. 18 20 22 %/VP 10V > VPN > 1.4V - - 17V > VPN > 1.4V - - ±2 ±0.5 mA %/10 Thermal regulation ℃ Condition IPN = IS %/V ℃ %/10 Threshold voltage Viboost IP = IS*1.1 11 12 13 V Current boost Iboost VP = Viboost 7 10 13 % * IS Switching Characteristics (T = 25°°C) Characteristic Symbol Condition Min. Typ. Max. Unit Output current rising time tRise VPN = 0V → 3V - 2.5 5 uS Output current falling time tFall VPN = 3V → 0V - 2.5 5 uS Minimum pulse width TPW VPN >= 2V 50 - - uS I/V curve 25 20 IPN 15 (mA) 10 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13 13.5 14 14.5 15 15.5 16 16.5 17 5 VPN (V) Application Circuits 48V lighting application D1 D2 D12 Cascade application in wide power supply system D1 D13 D2 Note: D3 VP VP NU20 NU20 VIn 48V ≒V ≒V LED + LED + N * 12V + 4V N * 1.4V “N” is the number of NU20. VN 13V ~ 36V VN Maximum VIN Minimum VIN VP NU20 PWM generator VN -2- Ver. 01 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805 NumEn Tech. NU503 Package Dimensions SOT23-3 Unit: mm Taping Specification PACKAGE Q’TY/REEL SOT23-3 3,000 ea Restrictions on product use NUMEN Tech. reserves the right to update these specifications in the future. The information contained herein is subject to change without notice. NUMEN Technology will continually working to improve the quality and reliability of its products. Nevertheless, semiconductor device in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing NUMEN products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such NUMEN products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that NUMEN products are used within specified operating ranges as set forth in the most recent NUMEN products specifications. The NUMEN products listed in this document are intended for usage in general electronics applications (lighting system, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These NUMEN products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of NUMEN products listed in this document shall be made at the customer’s own risk. -3- Ver. 01 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805